package com.mao.config;

import com.mao.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    /**
     * 静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
        log.info("静态资源映射成功");
    }

    /**
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //1.创建消息转换器对象
        MappingJackson2HttpMessageConverter mp2=new MappingJackson2HttpMessageConverter();
        //2.设置消息转化器对象，底层使用Jackson将Java对象装欢json对象
        mp2.setObjectMapper(new JacksonObjectMapper());
        //3.将消息转换器追加到mvc消息转换对象集合里，并设置优先使用这个
        converters.add(0,mp2);
    }
}
